With a little ingeneuity, and an understanding of basic geometry, it shouldn't be hard to adapt the original pedal linkage to your needs. Things like the booster, and the clutch master cylinder will have to be mounted under the cab, however. Be sure to provide for an access hole for filling/checking, or fabricate remote reserviors.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!